Home / 2,387.78-3,296.64-1,946.72

Finding the Fourth Proportional to 2,387.78, 3,296.64 and 1,946.72

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Solution

The fourth proportional to 2,387.78, 3,296.64 and 1,946.72 is: 2,687.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.78 : 3,296.64 = 1,946.72 : x
  2. Step 2: Convert to fraction form
    2,387.78/3,296.64 = 1,946.72/x
  3. Step 3: Cross multiply
    2,387.78x = 3,296.64 × 1,946.72
  4. Step 4: Simplify right side
    2,387.78x = 6,417,635.02
  5. Step 5: Solve for x
    x = 6,417,635.02/2,387.78
  6. Step 6: Final answer
    x = 2,687.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.